CN112196520A - Underground radar detection anti-collision short section, detection anti-collision system and detection anti-collision method - Google Patents
Underground radar detection anti-collision short section, detection anti-collision system and detection anti-collision method Download PDFInfo
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- CN112196520A CN112196520A CN202011197782.4A CN202011197782A CN112196520A CN 112196520 A CN112196520 A CN 112196520A CN 202011197782 A CN202011197782 A CN 202011197782A CN 112196520 A CN112196520 A CN 112196520A
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
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Abstract
The invention discloses an underground radar detection anti-collision short section, a detection anti-collision system and a detection anti-collision method, wherein the underground radar detection anti-collision short section comprises a body, and a radar transmitting antenna, a transmitting control unit, a radar receiving antenna, a receiving control unit, a control processing circuit and a battery which are arranged on the body; the detection anti-collision system comprises an underground radar detection anti-collision short section, an MWD or LWD short section, a pulser and a ground data processing center; the detection anti-collision method is realized based on a detection anti-collision system. The invention can detect the metal casing in the stratum around the drill bit in real time and accurately calculate the direction and distance of the adjacent well casing, and can effectively avoid the risk of well track collision.
Description
Technical Field
The invention relates to the field of oil drilling equipment, in particular to an underground radar detection anti-collision short section, a detection anti-collision system and a detection anti-collision method.
Background
With the development of economy and the acceleration of urbanization process in China, the development strength of each oil field is continuously expanded, and various special wells such as an adjusting well, a rolling development well, a cluster well and the like are gradually increased to develop residual oil and marginal oil reservoirs in old areas, so that the development method becomes an important way for increasing storage and increasing production of the oil fields. The continuous encryption of the well pattern increases the probability of the collision between the new well and the old well. In the process of drilling cluster wells or adjusting wells in old areas in recent years, the phenomenon that a straight well section is constructed to hit an adjacent well casing and an inclined well section is collided with each other is increased, scrapping footage and repeated construction sometimes occur, the casing of another adjacent well needs to be repaired after drilling of the well is completed, and even the scrapping of the adjacent well is caused. In addition, because the ranging precision is low, the well mouth spacing and the deflecting point spacing are often required to be large when the cluster wells are encrypted, which is not beneficial to the development of residual oil and marginal oil reservoirs in old areas. Therefore, the track collision prevention problem is increasingly prominent, the borehole distance measurement precision needs to be further improved, and particularly in the drilling process of various wells with complex structures, the relative azimuth and distance of adjacent wells need to be accurately measured so that the two adjacent wells are communicated or the wells are directionally drilled according to the designed distance.
Disclosure of Invention
The invention aims to make up for the defects of the prior art and provides an underground radar detection anti-collision short section, a detection anti-collision system and a detection anti-collision method.
In order to solve the technical problems, the invention adopts the following technical scheme:
the invention provides an underground radar detection anti-collision short section which comprises a body, a radar transmitting antenna, a transmitting control unit, a radar receiving antenna, a receiving control unit, a control processing circuit and a battery, wherein the body is arranged between a drill bit and an upper drilling tool;
the radar transmitting antenna is electrically connected with the transmitting control unit, the radar receiving antenna is electrically connected with the receiving control unit, the control processing circuit is electrically connected with the transmitting control unit and the receiving control unit respectively, and the battery supplies power to the radar transmitting antenna, the transmitting control unit, the radar receiving antenna, the receiving control unit and the control processing circuit;
the radar receiving antenna and the radar transmitting antenna are formed by two parts which are arranged in an up-and-down symmetrical mode and distributed in an 8 shape, and the radar receiving antenna and the radar transmitting antenna are further correspondingly arranged on the body up and down.
Furthermore, six open bins are arranged on the outer wall of the body, the six open bins comprise two upper open bins, two middle open bins and two lower open bins, the two upper open bins are arranged side by side along the upper circumferential direction of the body and are respectively used for installing the control processing circuit and the battery, the two middle open bins are arranged side by side along the middle circumferential direction of the body and are respectively used for installing the radar receiving antenna and the receiving control unit, and the two lower open bins are arranged side by side along the lower circumferential direction of the body and are respectively used for installing the radar transmitting antenna and the transmitting control unit; each opening bin is respectively covered by a cover plate, and communication holes are also formed between the opening bins so as to facilitate wiring.
Furthermore, the inner sides of the radar receiving antenna and the radar transmitting antenna are respectively provided with a back plate, and the two back plates are both wave-absorbing structures.
Furthermore, two cover plates for covering the radar receiving antenna and the radar transmitting antenna are made of insulating materials, and the rest of the cover plates and the body are made of metal materials.
The invention also provides a detection anti-collision system which comprises the underground radar detection anti-collision short section, the MWD or LWD short section, a pulser and a ground data processing center, wherein data detected by the underground radar detection anti-collision short section is analyzed and coded by the MWD or LWD short section and then uploaded to the ground data processing center through the pulser.
The invention also provides a detection anti-collision method, which comprises the following steps:
s1, starting a pump and detecting while drilling:
during detection, the underground radar detection anti-collision short section is put into a current working well along with a drill bit and an upper drilling tool, the control processing circuit starts a synchronous clock signal, the azimuth angle, the tool face angle and the rotating speed of the underground radar detection anti-collision short section at the current moment are recorded, and the transmitting control unit and the receiving control unit start to work simultaneously;
the transmitting control unit controls the radar transmitting antenna to transmit radar waves with certain frequency into the stratum, and the receiving control unit collects and stores signals of the radar receiving antenna and transmits the collected signals to the control processing circuit in real time;
the control processing circuit preliminarily judges whether an adjacent well exists around the current operation well according to the real-time signal returned by the receiving control unit, if so, the distance between the adjacent well and the current operation well is given, and the position of the sector is given by combining the azimuth angle, the tool face angle and the rotating speed recorded in the initial time;
s2, stopping pump detection:
stopping the radar transmitting antenna and the radar receiving antenna in the sector given in the step S1, finely adjusting the tool face angle of the underground radar detection collision prevention short section clockwise or anticlockwise, continuously transmitting and receiving by adopting the radar wave with the same frequency as that in the step S1 to realize accurate detection, and uploading the detection data to a ground data processing center through a pulser after the analysis and coding of the MWD or LWD short section.
Furthermore, the frequency of the radar wave emitted by the radar transmitting antenna is 200MHz, so that the radar wave can be used for detecting adjacent wells within the range of 2-4 meters of the square circle of the current operation well.
Further, the frequency of the radar waves emitted by the radar emitting antenna is 400MHz, so that the radar emitting antenna can be used for detecting adjacent wells within the range of 5-8 meters of the square circle of the current operation well.
Compared with the prior art, the invention has the beneficial effects that: the invention can calculate the direction and distance of the adjacent well according to the rotating speed of the drilling tool and the time difference between radar emission waves and reflection echoes, can determine the nearest distance between the adjacent well and the current operation well according to the change condition of the reflection echo waveform, and can judge the specific distribution condition of cluster wells around the current operation well according to the change condition of the reflection echo waveform. The invention can detect the metal casing in the stratum around the drill bit in real time and accurately calculate the direction and distance of the adjacent well casing, and can effectively avoid the risk of well track collision.
Drawings
In order that the advantages of the invention will be readily understood, a more particular description of the invention briefly described above will be rendered by reference to specific embodiments that are illustrated in the appended drawings. Understanding that these drawings depict only typical embodiments of the invention and are not therefore to be considered to be limiting of its scope, the invention will be described and explained with additional specificity and detail through the use of the accompanying drawings.
FIG. 1 is a schematic structural diagram of a down-hole radar detection anti-collision short section in the invention;
FIG. 2 is a schematic structural diagram of a radar transmitting antenna and a transmitting control unit installed on a body according to the present invention;
FIG. 3 is a schematic view of the detection collision avoidance system of the present invention;
FIG. 4 is a schematic diagram of the operation of the down-hole radar detection anti-collision short section in the drilling process;
fig. 5 is a schematic diagram of radar echo signal acquisition in the detection process.
The system comprises 1-underground radar detection anti-collision pup joint, 11-body, 111-pup joint male buckle, 112-pup joint female buckle, 113-opening cabin, 12-radar transmitting antenna, 13-transmitting control unit, 14-radar receiving antenna, 15-receiving control unit, 16-control processing circuit, 17-battery, 18-backboard, 2-drill bit, 3-MWD or LWD pup joint, 4-pulser, 5-ground data processing center, 100-current operation well and 200-adjacent well.
Detailed Description
In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that embodiments of the invention may be practiced without one or more of these specific details. In other instances, well-known features have not been described in detail so as not to obscure the embodiments of the invention.
In the following description, a detailed structure will be presented for a thorough understanding of embodiments of the invention. It is apparent that the implementation of the embodiments of the present invention is not limited to the specific details familiar to those skilled in the art. The following detailed description of preferred embodiments of the invention, however, the invention is capable of other embodiments in addition to those detailed.
In the description of the present invention, the terms "inside", "outside", "longitudinal", "transverse", "upper", "lower", "top", "bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are for convenience only to describe the present invention without requiring the present invention to be necessarily constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
Embodiments of the invention are described in further detail below with reference to the accompanying drawings:
as shown in fig. 1, the invention provides a down-hole radar detection anti-collision short section 1, which comprises a body 11, a radar transmitting antenna 12, a transmitting control unit 13, a radar receiving antenna 14, a receiving control unit 15, a control processing circuit 16 and a battery 17.
The lower extreme of body 11 is equipped with nipple joint pin 111 and is used for being connected with drill bit 2, and the upper end of body 11 is equipped with nipple joint box 112 and is used for being connected with upper portion drilling tool.
Be equipped with six on the outer wall of body totally and open the storehouse 113, six are opened the storehouse 113 including two and are opened the storehouse, two middle storehouse and two lower storehouse of opening, two are opened the storehouse and are set up side by side and be used for installation control processing circuit 16 and battery 17 respectively along the upper portion circumference of body on, two middle storehouses of opening set up side by side and be used for installing radar receiving antenna 14 and receipt control unit 15 respectively along the middle part circumference of body, two are opened the storehouse and are set up side by side and be used for installing radar transmitting antenna 12 and emission control unit 13 respectively along the lower part circumference of body under. Each of the open chambers 113 is covered by a cover (not shown) for protecting the components inside the open chamber 113, wherein the two covers for covering the radar receiving antenna 14 and the radar transmitting antenna 12 are made of an insulating material, such as PEEK material, and the other covers and the body 11 are made of metal material. In addition, communication holes are further formed among the open bins 113 so as to facilitate wiring and facilitate the realization of electric connection among elements.
The radar transmitting antenna 12 is electrically connected with the transmitting control unit 13, the radar receiving antenna 14 is electrically connected with the receiving control unit 15, the control processing circuit 16 is electrically connected with the transmitting control unit 13 and the receiving control unit 15 respectively, and the battery 17 supplies power to the radar transmitting antenna 12, the transmitting control unit 13, the radar receiving antenna 14, the receiving control unit 15 and the control processing circuit 16.
The radar receiving antenna 14 and the radar transmitting antenna 12 are identical in structure and are composed of two parts which are arranged in an up-down symmetrical mode, and the radar receiving antenna 14 and the radar transmitting antenna 12 are distributed in a shape like a Chinese character '8', as shown in fig. 2. The radar receiving antenna 14 and the radar transmitting antenna 12 are also installed on the body 11 in an up-down correspondence.
The inner sides of the radar receiving antenna 14 and the radar transmitting antenna 12 are respectively provided with a back plate 18, and the two back plates 18 are both wave-absorbing structures. During installation, the back plate 18 is fixed in a corresponding middle open cabin or a lower open cabin, and then the radar receiving antenna 14 and the radar transmitting antenna 12 are placed; the back plate 18 is disposed between the body 11 and the radar receiving antenna 14 or the radar transmitting antenna 12, and can absorb a large amount of radar waves emitted toward the body 11 to reduce interference of the body 11 with detection.
As shown in fig. 3, the invention also provides a detection collision prevention system, which comprises a down-hole radar detection collision prevention sub 1, an MWD or LWD sub 3, a pulser 4 and a ground data processing center 5. The underground radar detection collision prevention sub 1 is located in the current operating well 100, can transmit radar waves and receive radar echoes reflected by an adjacent well 200 (after the adjacent well is drilled), then processes radar echo signals by a control processing circuit 16, calculates the direction of the adjacent well 200 and the distance between the adjacent well 200 and the current operating well 100, then transmits data to an MWD (measurement while drilling) or LWD (logging while drilling) sub 3 through a pin cable by the underground radar detection collision prevention sub 1, analyzes and codes the data by the MWD or LWD sub 3, and then uploads the data to a ground data processing center 5 through a pulser 4.
The invention also provides a detection anti-collision method realized based on the detection anti-collision system, which comprises two detection modes, namely pump starting detection while drilling and pump stopping detection, and can respectively carry out primary detection and accurate detection on the adjacent wells 200 around the current operation well 100; the detection anti-collision method can also adopt two detection frequencies, namely 200MHz detection frequency and 400MHz detection frequency, and can respectively realize the detection in a short-distance range (2-4 meters of a current working well 100 square circle) and the detection in a longer-distance range (5-8 meters of the current working well 100 square circle) around the current working well 100.
Example 1: with reference to fig. 4 and 5, the current operation well 100 is precisely detected within a short distance.
The detection anti-collision method comprises the following specific steps:
s1, starting a pump and detecting while drilling:
during detection, the underground radar detection anti-collision short section 1 is lowered into the current working well 100 along with the drill bit 2 and the upper drilling tool, the control processing circuit 16 starts synchronous clock signals, the azimuth angle, the tool face angle and the rotating speed of the underground radar detection anti-collision short section 1 at the current moment are recorded, and the transmitting control unit 13 and the receiving control unit 15 start to work simultaneously.
The transmitting control unit 13 controls the radar transmitting antenna 12 to transmit 200MHz radar waves into the ground, and the receiving control unit 15 collects and stores radar echo signals of the radar receiving antenna 14, and transmits the collected signals to the control processing circuit 16 in real time.
The control processing circuit 16 preliminarily determines whether an adjacent well 200 exists around the current operation well 100 according to the real-time signal sent back by the receiving control unit 15, and if so, gives the distance between the adjacent well 200 and the current operation well 100 and gives the position of the sector by combining the azimuth angle, the tool face angle and the rotating speed recorded at the initial time.
S2, stopping pump detection:
stopping the radar transmitting antenna 12 and the radar receiving antenna 14 in the sector given in the step S1, fine-tuning the tool face angle of the underground radar detection anti-collision pup joint 1 clockwise or counterclockwise, continuously transmitting and receiving by using 200MHz radar waves to realize accurate detection, and uploading the detection data to the ground data processing center 5 through the pulser 4 after the analysis and encoding of the MWD or LWD pup joint 3.
Example 2: with reference to fig. 4 and 5, the current operation well 100 is precisely detected at a longer distance.
The detection anti-collision method comprises the following specific steps:
s1, starting a pump and detecting while drilling:
during detection, the underground radar detection anti-collision short section 1 is lowered into the current working well 100 along with the drill bit 2 and the upper drilling tool, the control processing circuit 16 starts synchronous clock signals, the azimuth angle, the tool face angle and the rotating speed of the underground radar detection anti-collision short section 1 at the current moment are recorded, and the transmitting control unit 13 and the receiving control unit 15 start to work simultaneously.
The transmitting control unit 13 controls the radar transmitting antenna 12 to transmit 400MHz radar waves into the formation, and the receiving control unit 15 collects and stores radar echo signals of the radar receiving antenna 14, and transmits the collected signals to the control processing circuit 16 in real time.
The control processing circuit 16 preliminarily determines whether an adjacent well 200 exists around the current operation well 100 according to the real-time signal sent back by the receiving control unit 15, and if so, gives the distance between the adjacent well 200 and the current operation well 100 and gives the position of the sector by combining the azimuth angle, the tool face angle and the rotating speed recorded at the initial time.
S2, stopping pump detection:
stopping the radar transmitting antenna 12 and the radar receiving antenna 14 in the sector given in the step S1, fine-tuning the tool face angle of the underground radar detection anti-collision pup joint 1 clockwise or counterclockwise, continuously transmitting and receiving by using 400MHz radar waves to realize accurate detection, and uploading the detection data to the ground data processing center 5 through the pulser 4 after the analysis and encoding of the MWD or LWD pup joint 3.
In summary, the present invention is not limited to the above-mentioned embodiments, and those skilled in the art can propose other embodiments within the technical teaching of the present invention, but these embodiments are included in the scope of the present invention.
Claims (8)
1. A down-hole radar detection anti-collision short section is characterized by comprising a body arranged between a drill bit and an upper drilling tool, and a radar transmitting antenna, a transmitting control unit, a radar receiving antenna, a receiving control unit, a control processing circuit and a battery which are arranged on the body;
the radar transmitting antenna is electrically connected with the transmitting control unit, the radar receiving antenna is electrically connected with the receiving control unit, the control processing circuit is electrically connected with the transmitting control unit and the receiving control unit respectively, and the battery supplies power to the radar transmitting antenna, the transmitting control unit, the radar receiving antenna, the receiving control unit and the control processing circuit;
the radar receiving antenna and the radar transmitting antenna are formed by two parts which are arranged in an up-and-down symmetrical mode and distributed in an 8 shape, and the radar receiving antenna and the radar transmitting antenna are further correspondingly arranged on the body up and down.
2. The underground radar detection anti-collision short section according to claim 1, wherein six open bins are arranged on the outer wall of the body, the six open bins comprise two upper open bins, two middle open bins and two lower open bins, the two upper open bins are arranged side by side along the upper circumferential direction of the body and are respectively used for installing the control processing circuit and the battery, the two middle open bins are arranged side by side along the middle circumferential direction of the body and are respectively used for installing the radar receiving antenna and the receiving control unit, and the two lower open bins are arranged side by side along the lower circumferential direction of the body and are respectively used for installing the radar transmitting antenna and the transmitting control unit; each opening bin is respectively covered by a cover plate, and communication holes are also formed between the opening bins so as to facilitate wiring.
3. The underground radar detection anti-collision short section according to claim 2, wherein a back plate is respectively arranged on the inner sides of the radar receiving antenna and the radar transmitting antenna, and both the back plates are of wave-absorbing structures.
4. The underground radar detection anti-collision short joint according to claim 2, wherein two cover plates for covering the radar receiving antenna and the radar transmitting antenna are made of insulating materials, and the rest of the cover plates and the body are made of metal materials.
5. A detection anti-collision system is characterized by comprising the underground radar detection anti-collision short section, the MWD or LWD short section, an impulse device and a ground data processing center according to any one of claims 1 to 4, wherein data detected by the underground radar detection anti-collision short section is analyzed and coded by the MWD or LWD short section and then uploaded to the ground data processing center through the impulse device.
6. A detection collision prevention method based on the detection collision prevention system according to claim 5, characterized by comprising the steps of:
s1, starting a pump and detecting while drilling:
during detection, the underground radar detection anti-collision short section is put into a current working well along with a drill bit and an upper drilling tool, the control processing circuit starts a synchronous clock signal, the azimuth angle, the tool face angle and the rotating speed of the underground radar detection anti-collision short section at the current moment are recorded, and the transmitting control unit and the receiving control unit start to work simultaneously;
the transmitting control unit controls the radar transmitting antenna to transmit radar waves with certain frequency into the stratum, and the receiving control unit collects and stores signals of the radar receiving antenna and transmits the collected signals to the control processing circuit in real time;
the control processing circuit preliminarily judges whether an adjacent well exists around the current operation well according to the real-time signal returned by the receiving control unit, if so, the distance between the adjacent well and the current operation well is given, and the position of the sector is given by combining the azimuth angle, the tool face angle and the rotating speed recorded in the initial time;
s2, stopping pump detection:
stopping the radar transmitting antenna and the radar receiving antenna in the sector given in the step S1, finely adjusting the tool face angle of the underground radar detection collision prevention short section clockwise or anticlockwise, continuously transmitting and receiving by adopting the radar wave with the same frequency as that in the step S1 to realize accurate detection, and uploading the detection data to a ground data processing center through a pulser after the analysis and coding of the MWD or LWD short section.
7. The detection anti-collision method according to claim 6, wherein the frequency of the radar wave emitted by the radar transmitting antenna is 200MHz, so as to detect the adjacent well within the range of 2-4 meters of the square circle of the current operation well.
8. The detection anti-collision method according to claim 6, wherein the frequency of the radar wave emitted by the radar transmitting antenna is 400MHz for detecting the adjacent well within 5-8 m of the square circle of the current operation well.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011197782.4A CN112196520A (en) | 2020-10-31 | 2020-10-31 | Underground radar detection anti-collision short section, detection anti-collision system and detection anti-collision method |
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| CN202011197782.4A CN112196520A (en) | 2020-10-31 | 2020-10-31 | Underground radar detection anti-collision short section, detection anti-collision system and detection anti-collision method |
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Application publication date: 20210108 |